Power-press



(No Model.)

N. o. STLES.

lOWER PRESS. l

No. 329,236. Patented Got. 27,1885.

UNITED lSTATES PATENT OFFICE.

NORMAN C. STILES, OF MIDDLETOWN, CONNECTICUT.

PowERPREss.

SPBCIFICATIQN forming part of Letters Patent No. 329,236. dated october27, 1885.

Application filed August 31, 1885. Serial No. 175,710. (No model.)

To all whom it mafy concern: f

Beit known that I, Non-MAN C. SriLEs, of Middletown, in the countyl ofMiddlesex and State of Connecticut, have invented a new Improvement inPower-Presses; and I do herey declare the following, when taken inconnectiou with accompanying drawings and the letters of referencemarked thereon, io be a full, clear, and exact description of the same,and which said drawings constitute part of this specification, andrepresent, in-

Figure 1, a perspective view of the press complete; Fig. 2, a side viewof the saine, illustrating the adjustment; Fig. 3, a longitudinalsection through the trunnion supporting the shaft, enlarged; Fig. 4, avertical cen- .tral section ofthe pitman at right angles to the axis ofthe eccentric or crank-pin driving it, showing side view of theadjusting-lever, enlarged; Fig. 5, -a face View of the same.

This invention relates to an improvement in machines used for punchingand drawing sheet metal, and in which a bed is provided to support thefixed die, and a slide above, arranged for vertical reciprocation,carrying a punchingv or `drawing die, commonly called powerpresses andparticularly to that class in which the bed is made adjustable, so

vas to stand at different angles I'or the convenience of the workman.

As heretofore constructed the whole mechanism ofthe press h'as beenarranged to swing or rock upon bearings below the bed, and such movementhas been upon an axis below the axis ol' the d rivingshat't, and so thatthe shalt itself necessarily moves, withthe rest of the press, in an arcot' the circle `from such center. Such movement of the shaft and itspulley necessarily produces a change in the tension of the belt,oecasioning dilliculties 'which are too apparent to require partculadescription.

The object of the iirst part of my invention is to produce the swingingor angul. r adjustinert of the press without disturbing the position orcenter ol' the shaft-that is to say, to make the swinging movement aboutthe shaft as its center; and this part of my invention consists inhanging the frame which supports the bed and slide upon bearingsconcentric with the shaft, and about which the said frame may swing as acenter of motion without dis- The second part of my invention relatestoan adjustment of the slide with relation to the bed, whereby it may besctat differenty the dies, and Without changing the throw of theeccentric; and this part of 1ny`invention consists in a circular diskarranged inthe eccentrically embrace the eccentric inthe and of the diskparallel, the said disk in the pitmanhead constructed with teeth uponits periphery, and with a lever hung in the pitman, and so as to swingin a plane parallel with the plane of the diskc, the lever having atoothed segmentv corresponding to the teeth in the disk and so as towork therein, all as more fully hereinafter described.

A A represent two uprights, which form the general support for thepress; B,the frame which carries the bed C as an integral part of it,and upon which bed the fixed dies may be arranged in the usual manner.The frame B is constructed with guides for the arrangement and movementof the slide D,also in the usual manner. At the upper end the frame isconstructed with a trunnion, E, at each side, larger than the shaftthrough which the press is to be operated. These trunnions takebearings,respectively, in the nprights A A, and so that theframewith'the bed and the slide it carries, may swing on said eecentricsas the center of motion, and as indicated in Fig.- 2, and so that thebed may stand at any desired angle. Longitudinally through the upperportionsof the frame, and concentric with the trunnions E, the shaft Fis arranged in the usual manner, and provided with the usualdriving-wheel, G.,- and the connections therewith. Between the two partsof the frame the shaft is constructed with the usual eccentric, H,which,through the pitman I, communithe eccentric operating through saidpitman in substantially the usual manner. The frame is adjusted to itsdifferent angles by means of 'a toothed segment, L, on the back of theframe,

cates reciprocating movement tothe slide D,-

turbing the axial center oi' the driving-shaft.

distances from the bed in the adjustment of head of the pitman, the saidvdisk adapted to driving-shaft, the axis of the driving-eccentric g ameaan and into which a worm, lil, works, and so that by turning theWorm-say as by a crank., hl the frame may be thrown outward, asindicated in broken lines, or in the opposite direction, and to anyextent to which it is desirable t0 incline the press. rlhis deviceaffords an easy and convenient means of adjusting; the press; but l donot wish to benndcrstood as limiting this part of my invention to suchmeans of adjustment.

V/'hile I prefer to construct the frame with trunnions to take hearingin uprights, and so as t0 swing independent of the sliafhthe frame maybe hung directly upon the shal'twthat is, the trunnions may be dispensedwith, as indicated in broken lines, Fig. 3. rllhc pitman l is`constructed with a divided head, the division being parallel with theaxis of the shaft, the two parts secured together by screws a c. In thehead between the two paris a circular recess is formed to receive adisk, Zi, which disk is considerably larger than the eccentric H on theshaft. For convenience this disk is made in two parts, the two partsinterlocked by rib and grooves, or otherwise, as shown in Fig. 4.Theaxis of the disk b is parallel with the axis of the shaft, andthrough the disk bis an eccentric opening, d, corresponding to theeccentric H on the shaft. The disk is corr strueted with gear teeth c onits periphery. The disk is adjustable in the head, or it may be firmlyclamped and placed so as to be fixed in the head by the screws a a. Unone side, preferably the front, of the pitman a lever,

f, is arranged to swing in a plane parallel with the disk, constructedwith a toothed segment, 7i, the teeth of which, correspond to the teetha in the diskb. Itis also eonstructcd with a trunniou, i, -upon eachside concentric with the segment l1. On the front side of the pitmanprojections Z nz` are formed, one above the other, but distant from eachother somewhat more than the diameter of the trunnions if, and upon theadjacent faces of the projections Z m a seat, o, is made to reccive thetrunnion i of the lever, and so that resting, say, in the lowerbearings, a downward movement of the lever will turn the disk baccordingly, or an upward movement ofthe lever will throw it into thebearing,r o above and turn the disk in thc opposite direction; or, ifthe lever bel lifted to take thc trunnions from the lower l'iearings, itmay be removed through the opening n between the two bear ings, so thatwhen not required for uscin the adjustment of the disk b lhc lever mayberemoved. Theadjustmentof the disk blcngtlr ens or increases the pitmanaccordingly as the center ofthe opening d is moved upward or downward-awcll-known adjustment in pitnien.

By making the disk b intwo paris, 'asshowm it is readily applied io theeccentric ll between the two parte of the frame. This division isnecessitated hecausethc shaftis parallel with the plane ol` theslide,instead of at right angles thereto, as in the more generalconstruction of power-presses.

l. ln a powcr-prcss, the frame of lhc press carrying the bed and slide,:onstructed with trunnions projecting at each side at the upper end ina. plane parallel with iheslide, the said trunnions supported inbearings in uprights, and whereby the bed and all it carries may swing;on said trunnions as a center of motion, combined with the drivi ngshaftconcentrically through said trunnions, ihe said shaft constructed withan eccentric, and with apitinan from said eccentricizo said slide,substantially as described, and whereby the said swinging movement ofthe frame is made concentric with the drivingshaft.

2. In a j )owcr-press, the combination ofthe uprights forming,` bearingsthrough which the drivingshaft extends, the frame carrying; a slide anddic-bed hung between said uprights, with the said drivingshaft as itscenter olmofion, the said shai'tbeing parallel with the slide carried bythe i'raine, and about which said shaft said frame and all it carriesmay swing as its center of inoiion without changing the relation of theslide to the diebed,substantiall y as described.

3. lin a power-press, the frame of thc press carrying the bed and slide,constructed with a trunnion project-ing at each side at the upper end ina plane parallel with the slide, the said trunnions fliupporlied inbearings in uprights, whereby the bed and all it carries may swingI onsaid trunnions as a center of motion, conn bincd with the driving-shaftconccniaically through said trunnions, the said shaft constructed .withan eccentric, and with a j )itman from said eccentric to said slide,substantially as described, and whereby ihe said swinging;` movement ol'the frame is made concentric with the drivingsha't,,and a mechanism,substantially such as described, for adjusting; the inclination of thesaid frame.

Ll. ln a power-press, the combination ofthe uprights forming` bearingsihrough which the drivingrshal't extends, the frame carrying,r a slideand diebcd hung between said uprights, withthc said driving-shaftas itscenter ol' inotion, the said shaft being parallel with the slide carriedby thc frame, and about which said shaft said frame and all it carriesmay swing as its center of motion without changing the relation of theslide to the dic-hcd, and the mechallisimsulstantiallysuch asdescribed,

-IIO

for adjusting the inclination ol' the said frame,

substantially as described.

il. A pitman having a circular recess at ils head, the axis ol' which isparallel with the axis ofthe drivingshal't, combined with a circulardisk, I, arranged in said recess, the said disk construeleil with aneccentric opening,f1, parallel with ils axis, and the said disk alsodivided in two parts in the plane nl' its axis and of the anis 'o1- thesaid eccentric olicuingr, and the lsaid disk also eonslriwml with tenthupon its periphery, with a lever, f, hung in said pitman, and arrangedto swing in aplane parallel with they plane of said disk, the said leverconstructed with a toothed segment, h, corresponding to the teeth on theperiphery of the disk, substantially as described.

6. A pitiuan having a circular recess in its head, the axis of which isparallel with the axis of the driving-shaft, combined with a eiroulardisk arranged in said recess, the said disk constructed with aneccentric opening, d, the axis of which is parallel with the axis of thedisk, and the disk also constructed with teeth upon its periphery7 thepitman constructed with projections lm in the plane of said disk, and soas to leave a space, 11, between said projections, each of saidprojections constructed with hearings o, parallel with the axis of saiddisk, thelever f, constructed with trunnions i, adapted to rest ineither of said bearings, as also to passin and out through the Saidspace n, the said lever also constructed with a toothed segment, l1,corresponding to the teeth ou the periphery of the disk b, substantiallyas described.

, NORMAN o. sTILEs'.

` Witnesses:

H. R. CLARK, J. B. WETHERBEE.

